rotordrive
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rotordrive [2012/04/06 08:28] – wadmin | rotordrive [2019/12/24 23:24] (current) – wadmin | ||
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==== RotorDrive ==== | ==== RotorDrive ==== | ||
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RotorDrive is my first attempt at building a solid state DIY Guitar Overdrive. Design is based on a dual transistor gain stage for power overdriving. | RotorDrive is my first attempt at building a solid state DIY Guitar Overdrive. Design is based on a dual transistor gain stage for power overdriving. | ||
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+ | Design constraints were kept to the minimum : only components with nominal values (multiples of 10), only one gain control for the first stage. | ||
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+ | The distortion is asymetrical and provided by either transistor power saturation or the unique diode at transistor stage 2. | ||
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+ | When " | ||
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+ | When " | ||
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+ | The sound of this medal is somehow quite "brute force" | ||
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+ | The volume output pot is optional, recommended mainly for assembly in a case on a final product. | ||
=== Schematic === | === Schematic === | ||
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+ | The " | ||
+ | The " | ||
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+ | The Gain can be modified by changing the feedback resistors R4 and R9 | ||
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+ | Changing the transistors itself should result in higher gain (ex switching to BC550). | ||
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+ | Generally, this schematic can be easily extended on use. Consider having a good power supply regulation, according to the gain of this dual stage. | ||
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+ | Note : R13 should not be installed, it has been added for simulation purpose. The output of this pedal is the tip of the volume potentiometer. | ||
=== Operation === | === Operation === | ||
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+ | A few time diagrams from Tina are shown herebelow to illustrate both boost and overdrive modes. | ||
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+ | Both diagrams represent the effect of the Gain potentiometer from 0 to 100% when Rotordrive is fed by a 60mV peak input signal, close to a standard Mic. | ||
== Boost == | == Boost == | ||
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== Drive == | == Drive == | ||
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rotordrive.1333700922.txt.gz · Last modified: 2018/08/26 09:36 (external edit)